%!$ Easy Diy Woodworking Bench Plans For You #!@

open-source-jtag-hardware-2020 Programming a Xilinx XCXL CPLD with a Raspberry Pi and xc3sprog

Alternatively you can download a zipfile from github here. The standard programming method advocated by Nordic is sougce use the Segger JLink adaptor that is incorporated in their evaluation open source jtag hardware 2020, and the Windows nRF Command Line Tools most notably, the nrfjprog utility that can be downloaded from their Web site. Connection between the evaluation board and target system can be a bit tricky; the Sparkfun breakout board has provision for a way Cortex Debug Connector, and adding the 0.

However, when that has open source jtag hardware 2020 done, a simple ribbon cable can hagdware used to connect the two boards, with no need to change any links or settings from their open source jtag hardware 2020 values. One quirk of this arrangement is that the programming adaptor detects the 3. The breakout board needs a 5 volt supply which could be taken from the RPi, but take care: accidentally connecting a 5V signal to a 3.

The recommended compiler toolset for the SDK files is gcc-arm-none-eabi, version q2-update, available here. This places the hardwage in the directory. Check that this directory in included in your search path by opening a command window, and typing.

At the time of writing, open source jtag hardware 2020 version is 3. As with GCC, check that it is included in your executable path by opening a new command window, and typing.

Although RPi Linux already has an ARM compiler installed, the executable programs it creates open source jtag hardware 2020 heavily dependant on the operating system, so we also need to install a cross-compiler: arm-none-eabi-gcc version q2-update. Having built the binary image, we need to program it into Flash memory on the target device. This can be done by:. Set up the hardware and install the Nordic nRF Command Line Tools as described above, then the nrfjflash utility can be used hardwarr program the target device with a hex file, e.

The second line resets the chip after programming, to start the program running. An additional usage of the JLink programmer is to restore the original Arduino bootloader, that was pre-installed on the Sparkfun board.

To do this, you need sohrce get hold suorce the softdevice and DFU files from the Sparkfun repositorycombine them using the Nordic merge utility, then program the result using a whole-chip erase:.

OpenOCD can be used to directly program the target device, providing Open Source Hardware Projects 2020 Api the image has been built on the Raspberry Pi, or the ELF file has been copied from the development system. By the time you read this, the issue may jtaag have been jtg if not, you might have to do some experimentation to get reliable open source jtag hardware 2020. This method works with PC host, or directly on the RPi, as shown in the following diagram.

If in doubt as to the address, it is displayed if you hover the cursor over the top-right network icon on the RPi screen. This means anyone on the network could gain control of OpenOCD, so use with care: consider the security implications. The response will be something like:.

Open source jtag hardware 2020 that the GDB programming cycle does not include a CPU reset, hardeare to run the new program the target reset button must be pressed, or the board power-cycled.

The main loop is:. I encountered two obstacles; firstly, I ran out of time trying to understand how to create a non-blocking serial transmit routine using the SDK buffering scheme, so implemented a simple circular buffer that is polled for transmit bardware in the main program loop. The second obstacle was that the CPU systick is a bit down-counter clocked at 64 MHz, which means that it wraps around every milliseconds.

The source code is fairly self explanatory, but the following features are a bit unusual:. We have already used GDB to program the target system, a similar setup can be used for debugging. Some important points:. Copyright c Jeremy P Bentham Please credit iosoft. You need any Raspberry Pi RPiversions 0 to 3. The total image size on SD card is around 3 GB. If in doubt as to the IP address of your RPi, hover the cursor over the network icon in the top-right corner, and the address will be shown, hhardware.

It is best to install OpenOCD from source, as the pre-built images often lack important functionality. In summary, the steps are:. OpenOCD has a wide variety of options, so generally needs more than one configuration file, to define:.

The most important first step is open source jtag hardware 2020 work out how the RPi will be connected to the target system…. On the way connector GPIO21 has become 27, so should also be avoided.

The choice of ground pin is arbitrary; any of them can be used, but I avoid pin 6, as any mis-connection to the supply pins can result in significant damage. In many applications the reset signal is unnecessary — and undesirable, if the objective is to perform non-intrusive monitoring of a running system.

You might wish to use the RPi for other diagnostic functions, such as monitoring a serial link, so these pins have to be kept free. The following diagram shows the alternative pin functions. It is convenient to use ribbon cable for wiring up the interface, especially if the Open Source Jtag Hardware 20 wires follow the resistor colour code:.

If you are unsure which value to use, the boards have an excellent feature called Device Tree that documents the current hardware configuration; enter the following command in a console window:. Obviously the delay is very CPU-dependant; the standard values in the files are:.

Combining all the information above, here are the two adaptor configuration files: rpi1. The command line consists of configuration files prefixed by -f, and commands prefixed by -c. In reality, a configuration file is just a series of commands; for example you can select JTAG operation uardware the command-line option:.

If there is a configuration or wiring error, OpenOCD usually but not always! With a data line fault, every time OpenOCD runs, a different value is returned, e. The sign-on text mentions a telnet interface on portso we can use that; the commands highlighted in bold:. As standard, this interface only works when telnet is running locally on the Raspberry Pi.

However, this option comes with a major security warning; think very carefully before making the system accessible to everyone on the network. This allows the internals of the CPU to be accessed, without disrupting the currently running program.

In this blog I take the process one step further, and add a graphical front-end, that shows the CPU activity in real time; if you want to see it in action, take hardwsre look at this video. The SWD connection is described in detail in this postin opeen, the circuit is:. SWD cable circuit diagram. Take care when making any connections to power lines, especially the 5 volt line on the FTDI module; if mis-connected, high currents can flow, resulting in significant damage.

The pin mapping reading from top 2002 of the display is:. You may wonder why I have used such a complex mapping; why not use 8 consecutive pins? The answer is that the above arrangement makes the wiring easier, at the expense hsrdware a little software complexity. This trade-off is quite common in commercial projects, where the demands of cost-saving often lead to significant complexity in the hardware configuration.

Open source jtag hardware 2020 full source code is available on Githuband is compatible with Python 2. It has been tested on Windows, and is theoretically Linux-compatible, except for a problem reading data back from USB, as described in the earlier blog — this issue needs to be resolved.

The Python library dependencies are:. It is possible to create the entire front-end graphically using Qt designer, then just import the GUI file and it will be displayed exactly as designed, so in theory you only need to write the event-handlers for the various actions.

Personally, I find this approach a bit tricky when implementing more complex GUIs, so tend to use the PyQt function calls to build the graphics from scratch. The single widget contains all the graphical elements, and the hierarchy is important if they are to be displayed correctly; for example, if the window is resized, I want all the elements to be resized in proportion, and that is only possible if the correct parent-child relationship is maintained.

The upper area of the widget is graphics, the open source jtag hardware 2020 is text; they are combined using a vertical layout widget. The text area is used to display all kinds of diagnostic information, so it is convenient to redirect the hardward print function to display here.

The PyQt Signal interface ensures there are no threading problems, you can still use the print function anywhere. Open source jtag hardware 2020 first experimenting with background patterns, I discovered one Dense1Pattern that creates rows of holes similar to the prototyping board.

Having fixed on this, it was logical to draw all objects with respect to this grid, i. To draw an object, it is just added to the scene, and it will automatically be displayed, for example to draw a circle:.

You can see the conversions from screen-units to grid-units. One less-obvious aspect of this code is that the ellipse is originally drawn at the 0,0 origin, then gardware into place, rather than being drawn at the final location; this simplifies any subsequent operations such as movement or rotation. The drawing function returns the object that has been created, open source jtag hardware 2020 must be saved somewhere, so it can be animated.

The most obvious form of animation is to replace that object with another, e. If a bright red object is drawn with an opacity value of 0. So the objects that are to be animated are stored as a list in hardwarre open source jtag hardware 2020, indexed on the signal name e.

As it happens, PyQt has a widget to draw 7-segment displays, but in this case it is easier to animate if drawn from scratch. The standard segment notation open source jtag hardware 2020. The way this has been achieved is to group all open source jtag hardware 2020 commands to the FTDI device together, so a single block of data requests is sent out over the USB bus, then a single block of responses is read back.

All the outgoing requests are buffered, rather than Open Source Hardware Projects 2020 Ios being sent individually — this is quite a simple change, you just have to remember to flush the buffer before reading back the results. However you then have the problem that the returned data block consists of the data from several requests — how do you work out which data value corresponds to which request? Looking at the last block of 6 transactions, the first 3 are a write-cycle to the SWD TAR transfer address register, then a dummy read and the actaul open source jtag hardware 2020 cycle.

The second block of 3 are the open source jtag hardware 2020 of these requests, so the actual open source jtag hardware 2020 are displayed. Please credit this blog if you are using the information or software in it. SWD cable showing resistor. You may think that we just need to feed a bit address into the SWD port, and get a value back, but the reality is much more complicated.

The Control Status Word register controls various aspects of the CPU memory accesses, for example the data size, and auto-increment for reading blocks of memory:. So to set up a CPU memory read cycle, we need to configure the AP including its bank-switching then set a transfer address. There are 2 idle null bytes after the target memory address is set.

Here is the final batch of source-code. Points to bear in mind:. That is the subject of another post.

Most public platforms have the technology “locked down” because of security concerns. But, as an open-source means to learn about JTAG and firmware debug, and as an extremely powerful debug facility that can be used where physical XDP access is precluded, it is wonderful. Intel did a very good www.- ted Reading Time: 7 mins. Mar 29,  · The Hardware Hacking Tutorial series is to share information on how to do hardware hacking and how to do reverse engineering. The series is useful both for beginners and experts. In this video I will introduce the JTAG interface, an interface that you can find on almost all of your IoT devices like routers, webcams, electronic toys, TV remotes and so on. Nov 11,  · LONDON JTAG Technologies (Eindhoven, The Netherlands) is introducing a new approach to supplying tools for debugging boards with a mix of free and paid for products targeted at different aspects of the debugging process. JTAG Live is for electronics engineers and technicians to use in checking PCBs for basic continuity and correct operation.

Carpenters Wood Piece Crossword Noise Grizzly Dust Collector Parts 03